Straining pulp or the like.



.l. PARAMORI STRAINING PULP OR THE LIKE.

APPLICATION FILED DEC.12. 1916- 2 SHEETS-SHEET I is E a w Q I I II 5 l w 5 I I I I I I I I I l I Q I 52 I I I I I.

I I I I g: I w I F I D s w N6 fm emori J. PARAMOR.

STRAINING PU LP OR THE LIKE.

APPLICATION FILED DEC.12. I916. I

Patented Apr. 2, 1918.

2 SHEETS-SHEET 2 mar-ran srrs arnr ornien.

JOHN PARAIVIOR, OF RICKI'EANSWORTH, ENGLAND, ASSIGNOR 0F ONE-THIRD TO THE WATFORD ENGINEERING WORKSQLIMITED, OF WATFORD, ENGLAND, AND ONE.- T HIRD T0 JOHN MAGLEAN HENRY, GF NE'WB'URY, ENGLAND.

srrnainrne rutr on THE LIKE.

nearest.

Specification of Letters Patent.

Patented Apr. 2, I918.

Application filed December 12, 1916. fierial No. 136,42.

To all whom it may concern:

Be it known. that I, JOHN PARAMon, a subject of the King of Great Britain and Ireland, residing at Park Road, Rickinansworth, I-Iertfordshire, England, have invented new and useful Improvements in Straining Pulp or the like, of which the following is a specification.

T his invention relates to improvements in paperpulp straining machines of the type wherein the straining surface is constituted by a series of revolving rolls arranged parallel to one another and at slight intervals apart. In machines of this kind as heretofore constructed, the knots which are incapable of passing through the interstices between the rolls have been allowed. to find their way toward, and to escape at, the extremity of the rolls; the separation of the knots from the fine materials being, under such conditions, but imperfectly efiected. According to my improved method or working, the flow of the pulp is in a direction transverse to the axes of the rolls; the knots escaping transversely over the last roll of the series constituting the straining surface.

In the accompanying drawings, Figure 1 is a longitudinal section; Fig. 2 a plan; Fig. 3' a transverse section, and Fig. l a part end elevation and part section of a machine constructed according to my improved method.

In carrying my invention into effect, I arrange, in conjunction with a pulp-vat a of any convenient form, a series of rotatably mounted rolls (2, Z), in such close proximity to one another as to leave a narrow longitudinal interstice 0 between each pair of rolls; these interstices corresponding in effect with the slits or openings in the strainerplates hitherto usually employed. As shown in Fig. 3, the rolls Z) are preferably arranged at gradually descending levels; the roll to which the pulp is first supplied'being that at the highest level of the series. Provision may also be made for varying the distance between each pair of rolls, and so reducing or increasing the width of the straining interstices to suit the character of the material under treatment. Such a variation may be efiected by substituting, for each alternate roll, one slightly smaller or one slightly larger in diameter; and it is with this view that an odd number of rolls is by preference employed. In the present design, however, means are provided for varying the distances between the axes of the rolls. With this object the rolls are mounted in bearing-boxes b which, by means of adjusting screws Z2 may be pressed together laterally; distance-pieces, composed of cardboard, veneer, sheet metal or the like, being inserted between the bearingboxes.

By means of any suitable gearing, such, for example, as pitch-chains d, the rolls Z), which all rotate in the same direction, are preferably caused to travel at different peripheral speeds; the uppermost roll, to which the pulp to be strained is supplied, being driven at the lowest speed, and the remaining rolls at speeds which gradually increase as the pulp flows over the straining bed in the direction indicated in Fig. 3 by arrows.

The escape of the pulp at the sides of the table or bed, formed by the series of rolls 6, is prevented by means of plates 6, 6, formed with notches 6 adapted to engage the necks of the rolls; supplementary wooden boards f, 7, formed with notches 7, adapted to fit the terminal portions of the rolls themselves, being also employed. As wear takes place, the boards 7 settle down upon the rolls in such a manner as to form joints sufliciently tight to prevent serious leakage. Any slight leakage, tending to creep along the roll-spindles and to gain access to their bearings, is arrested by means of drip-collars h, h, which may assume the form of india-rubber rings pushed on and tightly fitting the said spindles.

In practice, the fluid to be strained is brought by way of any convenient delivery to the uppermost roll (in the construction illustrated in Fig. 3, to the right-hand roll), and thence flows onto or is carried over the table or bed constituted by the rolls. $uch matter as is suificiently fine passes through the interstices between the latter into the pulp-vat 7', while the knots or insufficiently shredded constituents are trapped.

ing interstices c, c, the knots are passed gradually can from one pair of rotating rolls Instead, however, of lying quiescent over the strain to another; and, unless during this process they become sufliciently separated or reduced to pass through the straining interstices, are finally ejected by the last rOll into any convenient receptacle, such as 9. Under such conditions, the knots become separated and removed from the pulp, while the straining surface as a whole is rendered selfcleansin I claim 1. In apparatus for straining a liquid, the combination of a plurality of laterally spaced revolubly mounted elements, means for revolving all said elements in the same direction and means for causing the liquid to be strained to How transversely of the axes of said elements.

2. In apparatus for straining liquid, the combination of a plurality of laterally spaced elements revolubly mounted so that their axes lie in an inclined plane and that the axis of each element lies substantially in a horizontal plane, and means for revolving all said elements in the same direction.

8. In apparatus for straining liquid, the combination of a plurality of laterally spaced revolubly mounted elements, means for causing the liquid to be strained to flow transversely of the axes of said elements and means for revolving the said elements in the same direction and at speeds which gradually increase in the direction of flow of the liquid.

l. In apparatus for straining liquid, the combination of a plurality of laterally spaced revolubly mounted elements, means for revolving said elements and means for causing the liquid to be strained to flow transversely of the axes of said elements,

flonier of this patent may be obtained for five cents each, by addressing the fiommissi oner of iatenta said last means including a barrier at each end of the said elements.

5. In apparatus for straining liquid, the combination of a plurality of laterally spaced revolubly mounted elements, means for revolving said elements in the same direction, means for causing the liquid to be strained to flow transversely of the axes of said elements in the direction in which the said elements revolve, said last mentioned means including a barrier at each end of the said elements.

6. In apparatus for straining pulp, the combination of a plurality of closely spaced rolls defining a strainer, means for revolving said rolls in the same direction and means for causing the liquid to be strained toflow transversely of the axes of the rolls, said means including a barrier at each end of the rolls.

7. In apparatus for straining pulp, the combination of a plurality of closely spaced rolls so disposed that their axes lie in an inclined plane and that the axis of each roll lies substantially in a horizontal plane, means for revolving all the rolls in the same direction and a barrier across the ends of all the rolls.

8. In apparatus for straining pulp, the combination of a plurality ofclosely spaced rolls so disposed that their axes lie in an inclined plane and that the axis of each roll lies substantially in a horizontal plane,

'means for revolving all the rolls in the same direction and at speeds which gradually in crease toward the lower rolls, and a barrier across the ends of all the rolls.

JOHN PARAMOR.

Washington, D. G. 

